A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5990-01-459-9533
NSN 5990-01-249-2060
NSN 5905-01-229-3920
NSN 5985-01-367-5994
NSN 5996-00-204-4324
NSN 5905-01-482-6118
NSN 6220-00-391-1076
NSN 6135-01-468-6491
NSN 5835-01-268-1924
NSN 5985-01-254-4081
NSN 5999-01-605-1318
NSN 5895-01-067-7957